Permanent magnetic metal.



UNITED STATES PATENT OFFICE.

SAMUEL E. GERTLER, OF NEW YORK, N. Y., ASSIGNOR T CHARLES F. SPLITDQBF, 0F

NEW YORK, N. Y.

PERMANENT MAGNETIC METAL.

No Drawing.

To all whom it may concern:

Be it known that I, SAMUEL E. GERTLER,

a citizen of the United States, and resident of New York city, borough of Manhattan, in the county of New York and,State of New York, have invented certain new and useful Improvements in Permanent Magnetic Metals, of which the following is a specification.

heretofore used and known to me, such as steel having superior permanent magnetic.

qualities whereby to increase the efficiency of electrical instruments, machines and other devices in which magnetic steel is used.

In carrying out my invention I produce an alloy comprising steel and aluminum melted together in proper proportions to 'roduce the best permanent magnetic effects.

uch steel may be what is commonly called tungsten :steel or manganese steel, or steel containing both tungsten and manganese, with which the aluminum is incorporated. I find that 2.5% of aluminum incorporated by melting with the steel described produces a superior permanent magnetic metal. A suitab e alloy may be made by melting to ether the following ingredients 1n substantially the following proportions: tungsten 5.25%, carbon' .65%, silicon 15%, manganese 25%, chromium ..20%, sulfur and phosphorus Specification of Letters Patent.

Patented Oct. 12, 1909.

Application filed March 9, 1909. Serial No. 482,346.

.02% or less, aluminum 2.50%, and the remamder iron, to make 100% 111 all. The proportions I have given are approxunate,

but may be varied as desired. The aluminum may be mixed with the steel in any manner well known to those skilled in the art, as for instance, the various ingredients above described may be melted together in a suitable crucible at one time, or added in a manner to enable the mixture to retam when completed the above approximate proportions. v

A metal or steel produced in accordance with my invention will possess permanent magnetic qualities in high degree, which will be particularly useful in magnetos and also in other electrical instruments and machines.

Having now described my invention what I claim is 1. A permanent magnetic metal comprising tungsten steel and aluminum.

2. A permanent magnetic metal comprising tungsten steel and less than 5% of aluminum.

'3. A permanent magnetic metal comprising tungsten, carbon, silicon, manganese, chromium, sulfur and phosphorus, and aluminum.

4. A permanent magnetic steel comprising tungsten 5.25%, carbon 155%, silicon 15%, manganese .25%, chromium 20%, sulfur and phosphorus .02% or less, aluminum 2.50%, and iron to an amount providlng 100% in all.

Signed at New York city, in the county of New York, and State of New York, this 5th day of March, A. D. 1909.

SAMUEL E. GERTLER.

.Witnesses:

JOHN SPLrrnoRF, WILLIAM J. HART. 

